Door lock



E. D. DALL 2,582,237

'Jan. 15, 1952 DOOR LOCK Filed March 8, 1946 3 Sheets-Sheet l llllllllllllllllll 31 2 571 527? UP /0 HJWARDDDALL Z Q/MA/M fir? 5.

Jan. 15, 1952 DALL 2,582,237

I DOOR LOCK Filed March 8, 1946 3 Sheets-Sheet 2 .TWVEHZEI" [ow/1R0 0 BALL WWW Hal 5.

E. D. DALL DOOR LOCK Jan. 15, 1952 5 Sheets-Sheet 3 Filed March 8, 1946 Patented Jan. 15, 1952 UNITED STATES PATENT OFFICE EdwardDL DallfDetroit, Mich.-, assignor toTHoudaille-Hershey Corporation, "Detroit, Mich., a

corporation of'Michigan .AppIicatiOnMarchB, 1946, Serial No. 653,047

1 "Thisinvention relates to a'door'lock, and more particularly to a door lock structure for use on automobile doors.

In .accordance with the principles of my present invention, I provide an automobile door ,lockingistructure that j is so constructed and ,arranged as to offer certainnovel advantages over heretofore known doorllocks. Inthe past, dif- "ficulty has sometimes been experienced when thedoor'locking structureiis inadvertently placed .infitslocked position while the jdooriis ,open. If the dooriis ,slammedshut undertheseconditions, the lock is likely to become .jamm'ed .or at least injured. My present invention makes 'it impossible jfor the locking .structure to be operated into its locked position while the door is .open, thus eliminating .any possible damage under the conditions mentioned.

IA ffurther, feature 'of my invention is the .ilQrovision ,of means (for effectively rendering both the inside door handle mechanism and the outside .door .unlatching mechanism incapable .of operation to open the door. This'is principally for the ,purpose .of preventing children .on the inside of the .car from :opening the .door .accidentally or .whenthey shouldnotdoso. 'At the same time, if it should be desirable, the outside doorlatcl'iing mechanism canibef locked "from .the outside without looking the. insidelhandle .mechanism, soias to prevent .anyoneffromlbing locked on the I inside of .the car, .or .to prevent .the;.p,ossibilit'yrofikeys .beingilocked. in .the ,car.

It is therefore an important object .offthis invention to .provide .a door locking structure forautomobiles and .the like, .in which are incorporated certain novel safety .Tfeatures, 'including -a vconstruction preventing L-the locking of the .door,-either by the .key operated outside looking. mechanism..or by the inside door handle locking mechanism, while the Idoorlis lini its open position, .therebysafeguarding the door. locking mechanism against injury in casethedoorqshould belslammed shut with the locking mechanism in .its'. locked .,position.

I .It is .a further important-object of this invention to lprovide a .door flocking .mechanism for automobiles and the like,'in which'there is provided. means on .the .inside that. cannot easily be operated .by children and "that serves .the purpose of Zlocking together the inside .handle mechanism and the outside latching mechanism,

thereby further Zinsuring ,against an .unwitting or. accidental ,openingof the. doorfromthelinside.

Other and ..further important objects of Jthis invention w'ill'be apparent from the disclosures -27- "Claims. (01570- 153) in the. specificationand .the. accompanying .draw- .ings.

On .the. drawings:

.Eor .a better understanding .of the drawings, which will be presently described, it may .be

.pointed out that .the locking structure is assembled .onalbase plate formedto provide twoplate portions approximatelyat rightan'gles to each other. IIheplateportionwhich-isto be mounted on the opening edge of the door and which carries .the rotor assembly .for contacting ;.the striker .plate .on the door post will hereinafter be called the rotor plate. The other plate portion, which. fits. into position parallel to the inside wall of the door and on which is mountedthe roll back :means, will hereinafter .be .called -.the roll-.back plate.

.Fig. ,1 is abroken topplan view of .a locking structure embodying the principles of my-inven- .tion, .showing the locking structure .mounted .in place .relative to the .door .frame and the .outside mush-button "opening mechanism.

Fig. .2 is tafsectional .view taken substantially along .thebroken 1ine.II-II of Fig. 1 showing thelocking mechanism .mountedon the roll-back .plate with the lock .in the. latched .but unlocked position and .also :showing, with .parts broken vaway, the door operating .mechanisms -actuated,

respectively, .by the inside .door handle and by .a mutton-operated lever.

Fig. :3 is :a .sectional .view, similar .to Fig. .2, showing the locking mechanismzmountemon the roll-back plate, .but with the .lock in the unlatched, .unlocked position.

:Fig. A4 .is .a sectional view, similar .to Figs. .2

and.-3, but-showing the locking mechanism in the latched and locked position and also showing in dotted ,lines :the provision .made in the door moulding [for holding .the rmechanism in --locke.d position.

, Il a-.5 is a sectionaliview, .takensubstantially along-line N -V ofFig. 1,.of the lockin-g,meohanism .mounted on the rotor plate-showing .in full lines the. rotor .leverout .of engagement with thecamsurface as .is the case when .the door is -.open, "and showing in dot-dash lines theposition. of .the zrotorlever-on the cam. surface when thecdooris closed.

" ,Fig. .6 .is a fragmentary sectional .view taken substantially. along line .VI- VI of. Fig. .4 in. associationwithan elevational view .of .the. striker plate or .keeper structure .mounted .on the door post, illustrating the position ,of the rotor and safetycatchiarm .as the .door "approachesa closed position.

Fig. 7 is a fragmentary sectional view with the keeper structure in elevation, similar to Fig. 6 but showing the relative positioning of the parts just prior to the door becoming latched yet in safety-catch position.

Fig. 8 is a fragmentary, sectional view with the keeper structure in elevation, similar to Figs. 6

and 7 but with the parts in their relative positions after the door has been fully latched.

Fig. 9 is a fragmentary sectional view taken on line IX-IX of Fig. 2.

Fig. 10 is a fragmentary sectional view taken on line XX of Fig. 1.

Fig. 11 is a plan view of a modified form of locking structure embodying the principles of my invention, showing the locking structure mounted in place relative to the door frame and the outside push-button mechanism.

Fig. 12 is a sectional view taken substantially on line XIIXII of Fig. 11 showing the locking mechanism mounted on the roll-back plate with the lock in the latched but unlocked position and also showing, with parts broken away, the door operating mechanisms actuated, respectively, by the inside door handle and by a button-operated lever.

Fig; 13 is a sectional view, taken substantially along line XIII-XIII of Fig. 11 showing .the locking mechanism mounted on the roll-back plate with the lock in the unlatched, unlocked position.

Fig. 14 is a sectional view similar to Fig. 12 but showing the lock in the latched and locked position.

Fig. 15 is a fragmentary sectional view taken on line XVXV of Fig. 12.

With reference to Figures 1-8, inclusive, the locking mechanism of my invention here shown is one adapted to be used on either the front or rear doors of automobiles. My invention is not limited, however, to automobile door locking mechanisms but includes locking mechanisms for other types of doors, such as refrigerator doors. The main locking structure is assembled on a base plate formed to provide two plate portions disposed at approximately right angles to each other. Although these plate portions are ordinarily formed from a single base plate by bending the plate, they will be herein referred to a though they were separate plates, one being identified as the rotor plate and the other as the roll-back plate. As shown in Figures 2, 3 and 4, the roll-back plate is indicated by the reference numeral ID and comprises a rectangular plate that may suitably be formed from a lightgauge metal sheet. The rotor plate, later to be described, is indicated by the reference numeral 50.

A lever II is mounted for pivotal movement upon plate I!) about a pin I2. Said lever II is provided with an arcuate-shaped opening I3. At the lower extremity of said lever II is an outturned edge I4. A rod I5 is connected to the upper corner of lever I I. For this purpose said rod is provided with a lower offset end 15a (Fig. l) which extends outwardly at right angles through an opening in said lever II and is retained therein by the button head I1 formed on said end. Said rod I5 extends upwardly through the window moulding of the door and carries at its upper end a push button I8 to facilitate manual manipulation of the rod in the locking and unlocking operations, details of which will be apparent as the description proceeds. When rod I5 is pushed down it tends to rotate the lever II III clockwise about the pin I2. A projecting edge I9 on one side of the lever II is directly in the path of the outturned flange 20 on a strap 2I. Said strap H is connected to the inside door handle means, indicated generally by the numeral Ill! and to be described later on. As the outturned flange 2!] moves to the left it contacts the edge In and thereby tends to rotate the lever II in a clockwise direction about the pin I2. When the lever II is rotated in a clockwise direction, either by means of the rod I5 acting through its offset end I5a or by means of strap 21 acting through upturned edge 20, the locking mechanism is brought into locked position as illustrated in Fig. 4.

A roll-back lever 22 is mounted on top of the lever II for pivotal movement about the pin I2. A square-headed pin 23 is rigidly fastened in the lower part of the roll back lever 22. Said pin 23 extends through the arcuate opening I3 in the lever II and through a slot 24 in the strap 2|, being retained therein by the head 23a of said pin 23 (Fig. 10).

When the strap 2| is moved to the right, as shown in Fig. 2, the end 24a of the slot 24 bears against the pin 23, causing it to rotate the rollback lever 22 in a counterclockwise direction. As shown in Fig. 2, an arm 25 of the roll-back lever 22 extends into an opening 21 of a push-button lever 28 which is mounted on the rotor plate and which will be described later. When the rollback lever 22 is revolved counterclockwise, either by means of the strap 2| acting through the pin 23 or by means of the push-button lever 28 acting through its arm 29, the locking mechanism is brought into its unlatched, unlocked position, as illustrated in Fig. 3.

A dogging lever 30 is mounted upon said rollback plate Ifl. Said dogging lever 30 has an upwardly projecting tongue 3| for cooperation with the downwardly projecting tongue 26 formed on roll-back lever 22. Said dogging lever 30 also has a latching arm 32 which extends through a slot in the rotor plate 58 and. acts as a safety-catch arm, as well as acting as a means for rotating the dogging lever 30. A spring 33, anchored at 34 on the roll-back plate Iil, has a free end 35 biased against the under side 36 of the dogging lever 30 to resist any clockwise rotation of said dogging lever 30. As shown in Fig. 9, said dogging lever 30 has a cylindrical boss 31 which extends rearwardly through an opening in the roll-back plate I0 thus forming a pivoting means for said dogging lever 30.

A locking lever 40 is mounted on top of dogging lever 30. Said locking lever 40 is provided with a square aperture for receiving a square spindle 4| which constitutes the shank of the outside keyoperated look. A suitable type of key-operated lock is illustrated in my Patent No. 2,246,781. The construction of said locking lever 40 is such that it is rotated by the key-operated spindle independently of the dogging lever 30. As shown in Fig. 9, said locking lever 40 has a rearwardly extending cylindrical boss 42 which fits into a cylindrical opening in the dogging lever 30 thus providing a pivoting means for the locking lever 40.

Said locking lever 40 has two arms 43 and 44 which provide therebetween a pocket 45 for reception of the bent-up flange or edge I4 of the lever I I. The locking lever 40 is rotated counterclockwise by said edge I4 as the latter is rotated in a clockwise direction. Also, if the locking lever 40 is in locked position as shown in Fig. 4 it can be rotated clockwise out of locked position by the 5 action or the ed e I4 on the arm 44 as said ed I4 is rotated counterclockwise, A spring 41, anchored at one end, as at 48, between the roll-back plate l and the cover-plate 49, bears at its free end 41a against the lower edge of locking lever 48. Said locking lever 48 is provided with a pair of spaced notches 5I and 52, into one of which the free spring end 41a is adapted to be selectively positioned on rotation of the locking lever 48. Both the dogging lever 38 and the locking lever 48 are held in place on the roll-back plate by means of the cover plate 49.

, Referring to Figures 2 to 8, a rectangular housing 55 is mounted on the outside of the rotor plate 58. Mounted in said housing 55 is a rotor 56 which rotates upon a pin 51 the ends of which are anchored, respectively, in the outer wall of the housing and in the rotor plate 58. Said rotor 56 has a locking arm BI and a setting arm 68, best shown in'Figs. 6 to 8. A stud 62, anchored at one end in the locking arm 6I, projects through an arcuate slot 18 in the rotor plate 58.

Immediately adjacent the inside wall of the rotor plate 58, a rotor locking lever 88 is fulcrumed on the stud 62 (Fig. 5). 63 surrounds and i anchored at one end, as at 63a, to thestud 62, with its free end 631) held against an inwardly projecting arm 8I of the rotor locking lever 88. The action of said spring 63 tends to revolve said locking lever 88 in a counterclockwise direction about the stud 52. The inner end of the rotor fulcrum pin 5! acts as a stop tendin: to limit the rotating effect of spring 63, and when the stud 62 is at the lower end of the slot I8, as shown in Fig. 5, the rotor locking lever 88 is in contact with the pin 51 and the spring 63 is prevented from rotating the rotor lever further in a counterclockwise direction about stud 62.

A stud 82 extends inwardly from the rotor plate 58 adjacent the outer edge thereof to form a fulcrum support for the outer end of a holding and take-up lever 85. The upper edge of said lever 85 is provided with a notched or serrated surface, as at 85a. The rotor lever 88 has at its upper end an inwardly projecting tongue 86 having a curved edge 86a adapted to engage the upper edge 85a of the take-up lever 85. Said lever 85 has an arm 81 that is downwardly oifset from the upper edge 85a and that extends through a slot 81a in the roll-back plate I8. When the dogging lever 38 is in its dogging position, the end of the arm 8! rests thereon, as illustrated in Fig. 2, to prevent downward movement of said arm 81, whereas when the dogging lever 38 is out of its dogging position, as illustrated in Fig. 3, the arm 81 is free to drop and thereby effect a disengagement between the tongue 85 and the upper edge 85a of take-up lever 85, whereupon the rotor lever 88 is free to move out of engagement with said take-up lever 85.

The push-button lever 28 is mounted on top of the take-up lever 85 (Fig. 5) for pivotal move- A coiled spring ment about the pin 82. A spring 88 is anchored I at 88a to a strap 89. Said strap 89 is wrapped around the outer edge of the rotor plate 58 and is fastened at one end, as by welding in an offset pocket 96 of said rotor plate 58, as at 97 (Fig. 1); The other end of said strap 89 is positioned under the head of the pin 82. Said pin 82 is also anchored in the offset pocket 96. One end of the spring 88 abuts against the bent-up edge 28a (Fig. 5) of the push-button lever 28 and tends to rotate the lever 28 in-a counterclockwise direction. As may be seen in Fig. 1 this action of the spring 88 will tend to keep the offset end 28b of the lever 28 in contact with a push button I88 and will also return said push button I08 to its normal position after it has been depressed. When the push button lever 28 is rotated clockwise, its arm 29 will contact arm 25 of the ro1lback lever 22, causing said lever 22 to be rotated in a counterclockwise direction.

A handle assembly I8I includes 'a door handle I84'which a person may grip while pressing the push-button I88. Said assembly IN is fastened to the main door structure I85 by means of screws I82.

The operation of the locking mechanism will now be described.

Latching of the door is accomplished in the following manner. Let us assume that the door is open. The relative positions of the elements of the locking mechanism will then be as illustrated in Fig. 2. The dogging lever 38 assumes the position there shown due to the counterclockwise torque imposed upon it by the spring 33. On closing the door, the arm 32 of the dogging lever 38 is brought into contact with the keeper structure mounted on the door post.

As illustrated in Figs. 6 to 8 inclusive, the keeper structure K is of U-shape and provides a channel I I I, the middle portion of the upper wall of which is deflected downwardly to provide a V-shaped camming projection I I2 in the channel. The lower wall of the channel is deflected upwardly to provide a camming projection I I3 having a gradually inclined-guide surface II4 along its outer end and provided with a shoulder II5 along its inner end in advance of a recess II6.

When the door is swung from open position for closing thereof, the projecting safety-catch. arm 32 on the dogging lever 38 will encounter the inclined surface II4, thereby causing the dogging lever 38 to be rocked in a clockwise direction against the resistance of the spring 33. As closing of the door continues, the arm 32 rides up along the guide surface I I4 and along the intermediate horizontal portion of the camming surface I I3 until it reaches the shoulder I I5, whereupon the safety-catch arm 32 is free to drop and under the positive action of spring 33 is caused to drop down into the recess I I6 (Fig. '7).

The door is now in its closed, latched but unlocked position with the relative positions of the elements of the locking mechanism as shown in Fig. 2. From the instant that the safety catch arm 32 drops down in back of shoulder II5, the door will be safety-latched and cannot be opened from this position until the safety-catch arm 32 is swung out of the recess H6 by means of the release action of either the inside door handle or of the outside push-button.

After the safety-catch arm has dropped into recess H5 and the movement of the door is continued toward full latched position, the setting arm 68 of the rotor 56 comes into engagement with the inclined outer face of the projection H2 in the keeper channel, as shown in Fig. 7 Further closing movement of the door causes the rotor 56 to be rocked upon its fulcrum pin- 57, thereby rotating the locking arm 5! in a counterclockwise direction. Due to the fact that spring 83 tends to rotate the lever 88 in a counterclockwise direction and thereby to keep the lower edge 88a against the stud 51, said rotor locking lever 88 will also revolve as a unit in a counter-. clockwise direction about stud 51 when the rotor arm 6| is so revolved. However, when tongue 36 of the rotor locking lever 88 hits the side of the take-up lever 85 at 85b (Fig. 5), it will be forced upwardly in substantially a vertical direction 7 upon continued rotation of the rotor arm BI. Thus, the lower edge 80a of the rotor locking lever 30 is pulled away from the stud 51 against the action of the spring 63. When, in its upward movement, the curved surface 86a reaches the top of the cam surface 85a, the action of the spring 63 will move the tongue 86 to the left along said cam surface 85a. The cam surface 85a is designed with an are such that the further the tongue 86 moves to the left along the cam surface the closer the spring 63 will come to restoring the lower edge 80a of rotor locking lever 80 on the stud 51. However, in the total. travel across said cam surface the edge 80a will not quite come to rest on the stud and therefore there is, for any position of the tongue 86 on the cam surface, a force due to the spring 63 tending to press said tongue 86 against said cam surface 85a.

At the same time as the tongue 86 is starting to move to the left across the cam surface 85a, the end of the rotor locking arm 6| moves into engagement with the rear inclined surface I I8 of the projection II2 on the keeper K until it reaches the position illustrated in Fig. 8. In this position the door is latched and cannot be opened until the rotor 56 is free to revolve about its fulcrum pin 57 in a clockwise direction. In the latched position, the rotor 56 cannot revolve in a clockwise direction because the tongue 85, which is an integral par-t of rotor locking lever 80, is now up on the cam surface 85a of the takeup lever 85. Said take-up lever, in turn, cannot move in a clockwise direction, or downwardly, because its projecting arm 81 is prevented from moving in a Vertical direction by the dogging lever 30, the under surface of the arm 87 then resting upon the upper edge 30a of said dogging lever as shown in Fig. 2.

With the locking mechanism in the position illustrated in Fig. 2 and the rotor lever 56 in the position illustrated in Fig. 8, the total effect of the action of the inclined surface II8 of the keeper against the locking arm BI is to press the tongue 86 more firmly down upon the camming surface 850. of the take-up lever 85 whenever a force is exerted against the door tending to open it, provided there is no concurrent use of the door handle release means. Such a force, for instance, would be exerted against the door if a person or object were accidentally to lean or be thrown against the inside of the door. At any position that the tongue 86 may assume along the camming surface 85a of the take-up lever 85, it will be held tightly in place by the action of the inclined surface I I8 of the keeper against the locking arm BI. Thus, while the tongue 86 will move across the camming surface only as far as is dictated by the amount of force used in closing the door jamb, said tongue 86 will nevertheless be held in tight engagement with the camming surface 85a for any position therealong that the tongue 08 may assume. The provision of a serrated, notched or wavy cam surface 8511 on the take-up lever 85 nullifies the effect of vibration on the holding qualities of tongue 86, so that no amount of vibration by itself can loosen the engagement of the tongue 85 with the cam surface 05a. although such vibration may produce a tightening effect due to the continued biasing action of the spring 63 tending to move the tongue 86 into tighter and tighter engagement with the camming surface 85a.

The pressure which the tongue 86 of locking lever 80 exerts on the camming surface 85a acts through a moment arm about the center of the stud 82 and thus causes the take-up lever to exert a pressure on the dogging lever 30. The tighter the door is closed, the shorter will be this moment arm since the tongue 86 will move further up along the camming surface 85a. However, at the same time the moment arm is being shortened, the pressure of the tongue 86 on the camming surface 85a is being increased due to the tighter closing of the door, and as a result the pressure of arm 87 of lever 85 on the dogging lever 30 will remain substantially constant. Therefore the force required for releasing the dogging lever 30 from under the arm 81 will remain nearly constant for all closed positions of the door.

The unlatching and opening of the door will now be described. From the preceding discussion it is evident that the one way in which the door may be unlatched is to move the dogging lever 30 from under the arm 8'! of the take-up lever 85. This will allow the take-up lever 85 to swing downwardly about the stud 82, permitting the tongue 86 to slide back along the cam surface 05a whenever the surface I I8 of the keeper exerts a force on the rotor locking arm 6| that tends to rotate said rotor locking arm in a clockwise direction. The dogging lever 30 may be withdrawn from under the arm 81 by either one of two methods.

In accordance with one of these methods, the dogging lever 30 may be rotated from under the arm 81 by the outside push button I00 (Fig. l) acting through the push-button lever 28 and the roll-back lever 22. When the push button I00 is pressed in, it pushes in the offset end 281) of the push-button lever 28, causing said lever 28 to be rotated in a clockwise direction about its fulcrum pin 82. The arm 29 of the push-button lever 28 thereupon bears down upon the arm 25 of the roll-back lever 22 to force it downwardly, thus causing said roll-back lever 22 to be rotated in a counterclockwise direction about pin I2. The abutting arm 26 of the roll-back lever 22 is thus urged against arm SI of the dogging lever 30, causing it to rotate said dogging lever 30 in a clockwise direction about its cylindrical boss 31 (Fig. 9). As a result, edge 30a of said dogging lever 30 is withdrawn from under the arm 81 of the take-up lever 85, and at the same time the safety-catch arm 32 is raised above the level of the shoulder II5 of the keeper K. When the locking mechanism is in this position (Fig. 3), the door can be opened by an outward pull of the handle I04, outward movement of the door causing the surface H8 of the keeper to rotate the locking arm SI in a clockwise direction to ermit the door to open.

A second method of unlatching the door is by means of the inside door handle mechanism. As illustrated in Fig. 2, the inside door handle mechanism III] includes an inside door handle I20, extending from a shaft IZI.

I2I and at its lower end is pivotally connected, as at I23, to the free end of the strap 2I.- A

spring I24 tends to maintain the shaft I2I and the pin 23 it will pull said pin 23 in a counter clockwise direction about the pin I2 and, since pin 23 is rigidly fastened to the roll-back lever A downwardly ex-- tending lever arm I22 is mounted upon said shaft 22', said roll-back lever 22' will be rotated in a counterclockwise direction about the pin I2. The abutting arm 26 of said roll-back lever 22 will contact the arm 3| of the dogging lever 33 and cause said dogging lever to be rotated clockwise about its cylindrical boss 31 (Fig. 9). Thus the edge 30 will be withdrawn from under the arm 81 of the take-up lever 85. When this occurs, the door is. free to be pushed open from the inside.

It should be noted that if the door had been partially closed with the safety-catch arm 32 lying in the recess N6 of the keeper K, either of the above-mentioned releasing methods will result in the withdrawal of the arm 32 from said recess IIG, since the arm 32 is an integral part of. the dogging lever 30 and rotates when said dogging lever rotates. The un latchedposition is shown in Fig. 3.

The operation of the locking means will now be described. Referring to Fig. 4, the door may be locked by any of three methods. From the outside,.locking'may be accomplished by revolving the square spindle 4| by means of a key. When the spindle 4| is rotated in a counterclockwise direction, the locking lever Mi will also be rotated in acounterclockwise direction about its cylindrical boss 42 (Fig. 9) and arm .3 or said locking lever 40 will be rotated into a position directly under arm 29a of the push button lever 23, thus limiting the downward movement of said arm- 29a. Since the outside push-button Iilil acts through the. push-button lever 28 to effect the unlatching of the door, this means of unlatching the dooris rendered inoperative when said pushbutton lever 28 is prevented from moving downward. Thus the door may be locked against entry from the outside. It should be notedhowever, that restricting the downward movement. of push-button lever 23 does not effect the operation of the roll-back lever 22 or dogging lever 38 and therefore the door may still be unlatched from the inside by means of the inside door handle I 20 acting through said roll-back lever 22 to rotate dogging lever 30.

A second method of. locking the door is by means of the inside door handle I22. .By lifting. up the end of said handle I23 to turn it about its fulcrum I2I, the arm I 22 is rotated clockwise and the strap 2| is pushed to the left thru the action of the pin I23. The upturned edge 2:) of said strap ZIeontacts the lever iI along the edge I9 and causes said lever H to be rotated clockwise about the pin I 2. The upturned edge Is of said lever I I contacts the arm 43 of the locking lever 40 and thus rotates said locking lever ill into the locked position (Fig. 4). In this manner the door can be locked from the inside. against entry from the outside. v

A third method of locking the door is by means of the push-rod I 5 which extends up through the window moulding of the door. in. Fig. 2 the unlocked position of said push rod I5 is shown. In Fig. 4 the push rod !5 has been pressed down causing the lever I i to be rotated clockwise about the pin Ill. The upturned edge It of said lever I I has contacted arm 43 of the locking lever to and rotated it counterclockwise into the locked position under-arm 29a of the push-button lever 28. This is another method of locking the door from the inside against entry from the outside.

As has been explained, the door may be locked from the outside by means of a key or from the inside by means of the push rod I5 or the inside door handle I20. Locking the door by any of playing with the inside door handle.

tion this arrangement aiiords maximum convenience and utility. However, in case small children are riding in the car it is desirablethat they cannot open the door accidentally while To meet this situation I have provided a slot I30a (Fig. 4) in the window moulding I30 of the door. When the push rod I5 is depressed straight down the door is locked as previously explained. If said push rod I5 is now pushed to the right so that it'pivots about pin I! the upper edge I60. of collar I6 takes up a position under the edge of the window moulding I30, as illustrated in dotted lines in Fig. 4, and thus is restrained from upward movement. With the push-rod I5 in this position it is impossible to rotate the lever II in a counterclockwise direction by any means. Since an edge IIa of lever II is then abutting the arm 3| of the dogging lever 30, said dogging lever 30 is prevented from clockwise movement. Thus the arm 26 of the roll-back lever 22 is not able to rotate the dogging lever 30 and therefore the inside door handle means of opening the door is rendered inoperative.

When the locking mechanism is in its locked. position with the collar I6 of the push rod I5 in.

place under the moulding of the door, all movable parts mounted on the roll-back plate III are locked in position as shown in Fig. 4. If the door should be open when the collar I6 is put in place under said moulding I30, upon closing the.

door there is the possibility that the locking mechanism will get. jammed or that some parts will be broken due to the fact that the safetycatch arm 32 of dogging-lever 30 will be urged up the sloping surface II4 of keeper K. Since s3 is in a position near the rollback plate I0.

When the rotor locking lever is in the latched position as shown in dotted lines, the spring 63 has been rotated away from the roll-back plate III, leaving an opening into which the arm 45 of the locking lever 40 will move when said locking lever 40 is rotated counterclockwise toward the locked position (Fig. 4). When the door is open, the rotor locking lever 80 is in the unlatched position. If an attempt is made to rotate the looking lever 40 into locked position said arm 46 will strike the spring 63 and thus be prevented from reaching the locked position. Thus the possibility of damaging the locking mechanism by slamming the door after it has been locked is eliminated.

From the foregoing description, it will be evident that, since the door cannot be put into locked position while it is open and since it can be locked from the outside only by means of a .key, no one can lock himself out of the car by slamming the door while the keys are on the inside.

Figures 11, 12, 13 and 14 illustrate a modified form of my invention of a locking structure as applied to an automobile door. In this modification the principle of operation is substantially the same as already described in connection with Figures 1 to 10 inclusive.

As shown in Fig. 12 the numeral 2 I designates a roll-back plate on which is mounted a roll-back lever 222 for pivotal movement about a pin 2I2. On the upper portion of said roll-back lever 222 is an upturned edge 221 and on the left side of said roll-back lever 222 is another upturned edge 225. The roll-back lever 222 also has a downwardly projecting arm 226.

A lever 2 is mounted on top of the roll-back lever 222 and also pivots about the pin 2 I2. An arcuate opening 2 I3 is provided in said lever 2I I (Fig. 12) which serves as a guide for the travel of a pin 2I1 projecting inwardly from a rod 2 I5. Said rod 2 I extends upwardly through the window moulding of the door and carries at its upper end a push-button 2I8 to facilitate manual manipulation of the rod in the locking or unlocking operation, details of which will be explained later. A shoulder 220 of the lever 2 I I is so situated that it will contact the upturned edge 221 of the roll-back lever 222 when said lever 2 I I is rotated in a counterclockwise direction. A bent-up edge 2I4 is provided at the lower extremity of lever 2. A pin 223 is rigidly secured to the lever 2 I I and projects inwardly into a slot 224 provided in a strap 22I. Said strap 22I is connected to the inside handle mechanism, identical with the handle mechanism Illl previously described in connection with Fig. 2.

A dogging lever 230 is mounted on the roll-back plate 2I0. As shown in Fig. 15, said dogging lever 230 has a cylindrical boss 231 which extends rearwardly through an opening in the rollback plate 2| 0 thus forming a pivoting means for said dogging lever 230. Said dogging lever 238- has an upwardly projecting tongue 23I for cooperation with the downwardly projecting tongue 226 formed on the roll-back lever 222. A latching arm 232 is also provided which extends through the rotor plate 250 and acts as a safety catch arm, as well as acting as a means for rotating the dogging lever 238. A spring 233, anchored at 234 on the roll-back plate 2| 0, has a free end 235 biased against the under side 236 of the dogging lever 23!] to resist any clockwise rotation of said dogging lever 230.

A locking lever 24!] is mounted on top of the dogging lever 238. Said locking lever 240 is provided with a square aperture for receiving a square spindle 24! which constitutes the shank of the outside key-operated lock. As shown in Fig. 15, said locking lever 248' has a rearwardly extending cylindrical boss 242 which fits into a cylindrical opening in the dogging lever 230, thus providing a pivoting means for said locking lever Said locking lever 248 has two arms 243 and 244 which provide therebetween a pocket 245 for reception of and engagement by the bent-up flange or edge 2I4 of lever 2. The locking lever 248 may be rotated counterclockwise by the contact of said edge 2I4 against the arm 243 as said lever 2 is rotated clockwise. Said locking lever 240' may be rotated clockwise by the contact of said edge 2I4 against the arm 244 of said lever 240 when the lever 2II is rotated in a counterclockwise direction. A spring 241, anchored at one end, as at 248, between the rollback plate 2I0 and the cover-plate 248, bears at its free end 241a against the lower edge of the locking lever 248. Said locking lever 246 is provided with a pair of spaced notches 25I and 252,

into one of which the free spring end 241a is surface 285a of the take-up lever 285.

rotor plate 250, as at 291 (Fig. 11).

12 adapted to be selectively positioned on rotation of locking lever 24!]. Both the dogging lever 238 and the locking lever 240 are held in place on the roll-back plate by means of the cover-plate 248.

The positioning of the parts of the locking mechanism upon the rotor plate 250 is quite similar to that already described in connection with Fig. 5. On the outer side of said rotor plate 250 is secured a rectangular housing 255 for the rotor 256. Said rotor 256 is identical in form and construction with the rotor 56 previously described. The rotor 256 is mounted for rocking movement upon a pin 251 and is provided with a locking arm 26I and a setting arm 260. A stud 262 extending from the end of the arm 26I projects through an arcuate slot 218 in the rotor plate 250. A rotor locking lever 286 is fulcrumed upon the stud 262. A coiled spring 263 surrounds the stud 262 and is anchored at one end thereto, the free end being held against an abutment arm 28I of the rotor locking lever 280.

The fulcrum pin 251 provides a stop for the counterclockwise rotation of the rotor locking lever 288 when the stud 262 is at the lower end of the slot 210. As the rotor locking lever 280 is carried upwardly by the counterclockwise movement of arm 26I of the rotor 256 acting through the stud 262, the edge 280a of said rotor locking lever 286 is forced away from the pin 251. When the tongue 286 of rotor locking lever 280 is raised to the edge of the cam surface 285a, the action of the spring 263 tending to rotate said rotor locking lever 280 about stud 262 will move the tongue 286 to the left along the cam Said take-up lever 285 is mounted on the rotor-plate 250 for pivotal movement about the pin 282. The other end of said take-up lever 285 is provided with an arm 281 that extends through a slot 28111 in the roll-back plate 2"]. Said arm 281 is prevented from dropping down when it rests on the upper edge 238a of the dogging lever 230, as illustrated in Fig. 12.

A push-button lever 228 is mounted on top of the lever 285 for pivotal movement about the pin v282. A spring 288 is anchored at 288a to a strap 289. Said strap 289 is wrapped around the outer edge of the rotor plate 250 and is secured at one end, as by welding in an offset pocket 296 of said The other end of the strap 289 is positioned under the head of the pin 282. Said pin 282 is also anchored in the offset pocket 296. One end of said spring 288 abuts against the upturned edge 228a of pushbutton lever 228 and tends to keep the bent-over edge 22812 in contact with the push-button 200 (Fig. 11). This spring action will also return said push-button 200 to its normal position after it has been pressed inwardly to unlatch the door. When the push-button lever 228 is rotated in a clockwise direction, the upturned edge 22!! (Fig. 12) will contact the edge 225 of roll-back lever 222, causing said lever 222 to be rotated in a counterclockwise direction.

As shown in Fig. 11, the push-button lever 223 has an offset end 2281) in contact with the outside push-button 280. Due to this contact the push-button lever 228 is rotated clockwise when the push-button 288 is pressed inwardly. The hand assembly 28I associated with said push button 258 is identical with that described in connection with Fig. 1.

In the case of the modification of my locking mechanism illustrated in Figures 11 to 15, in-

elusive latching of. the door'is accomplished in the following manner. Let us assume that the door is open. The locking mechanism will then normally be in the positionillustrated in Figures 12 and 13. Upon closing the door, the-safety catch arm 232 of the dogging levcr230-comes into contact with the keeper structure, suchas thekeeper structure K. (Figures 6, 7 and 8) al.- readyv described. When the door is swungfrom open position to closed position, the. projecting safety-catch arm 232 encounters the inclined surface H4 of the keeper structure, causing the dogging lever 238 to be rocked in aclockwise direction against the resistance of the spring 233. The safety-catch arm 232 rides along the surface H 4, on to the horizontal portion of; projection H3 until the shoulder H5 is reached, whereupon the arm 232 under theaction of spring 233: is caused to drop dcwninto the recess H5. The dogging lever 232 is thereby allowed to swing back into its normal position and-if the movement of the door toward closing is stopped at this point, the door will then besafety-latched' and cannot be opened until the safety-catch arm 232. is swung out of the recess [is by means of. the release action of the inside door handle (not shown) or the outside push-button 2% acting thru levers 228. and 222.

During the closing of the door, the. setting arm. 260 of the rotor 256-comes into engagement with'the inclinedouter face Ill of the projection H2 in the keeper channel. As the rotor 25B isrocked on its fulcrum pin 25?, the locking arm 26! of the rotor 255 swings upwardly, causing the rotor locking lever 28d to move bodily along the slot 212. Such movement brings the locking lever tongue 225 above the cainrning snrface 285cm? the take up lever 2315, whereupon the spring 263- urges said tongue 25's along said camming surface for engagement therewith. At thesame time, the end of the locking arm 26! moves into engagement with the rear inclined surface H8 of the projection H2 in the keeper channel as the door reaches its closed position. In this position the dooris latched but not locked,

the locking mechanism being in the position.

shown in. Fig. 12.

The door can'ce unlatched by pushing in the outside push button 2253, thereby rotating in a clockwise direction the push-button lever 2.28 which in turn, by the action of. the edge 229 or" said push-button lever on the upturnededge 225 of the roll-back lever 222 rotatessaid roll-back lever in a counterclockwise direction. Arm 225 of said. roll-back lever 222. contacts the upwardly" projecting arm 231 of the dogging lever 230=and thereby causes said dogging lever 23s to be rotated. clockwise out from underneath the arm 28? of the take-up lever-2B5. As soon as said dogging lever 230 has been rotated out ofsupporting position with respect to the arm 281, said arm is free to drop and release the tongue 23% from engagement with the camming surface 285cc, thereby also permitting the rotor. 2.55 to rock about its fulcrum whenever an outward pressure is put on thedoor to open it The door may be unlatched also. by means of the inside door handle mechanism (not shown) acting thru strap 22! (Fig. 12). As said strap 22I is moved to the right the inner edge 221a of the slot 224 contacts the pin 223'of'the lei'er 2H. Further movement of said strap 221 to the right causes said lever 2H to be rotated counterclockwise about the pin 2l2. The shoulder 2 2B thereupon contacts theupturned edge 221' of'the 14 roll-back. lever 222, causing-said rolleback. lever to be rotated counterclockwise. Arm 22.6 of said lever 222 will contact arm 23! of dogging lever' 23c and thus. rotate said lever 23:! from underneath, the arm 28? of. the take-up lever 285.

safety-catch arm 232 in the recess HS of thekeeper structure, either of the above mentioned.

releasing methods will withdraw the safety-catch arm 232 from said recess, since the arm 232 is.

part of the dogging lever 2353 and will rotate with it.

The locking mechanism, may be put into locked position by either. of three methods. From the outside, looking may be accomplished by revolving the square spindle 22! by means of' a key. When the spindle 24! is rotated in a counter.-

clockwise direction the locking lever 240 is also rotated in a counterclockwise direction about its cylindrical boss 262 (Fig. 15) and arm 243, of

said locking lever 240 is rotated into a positiondirectly under the. upturned edge 225 of the rollback lever 222, thus preventing the downward movement of said edge 225. Since all unlatchingoperations depend upon the downward movement of the edge 225 ofrthe roll-back lever 222 as said roll-back lever is rotated in a clockwise direction, the positioning of arm 243 under said edge 225 efiecitvely locks the mechanism. The locking lever 240 is held in'this Position by the action of spring 241, the end 241a of which has now been positioned in the detent 25! of said locking lever: 240. The locked position is illustrated in Fig. 14.-

The door may be locked from the inside by means of the inside door handle mechanism acting thru the strap 22L When said strap 22! is.

' moved to the left by the action of the inside doorhandle the edge 22lb of the slot 224 will come 14. Thus the door may be locked from the insideagainst entry from the outside.

The. third method of locking the door is by use of the push-rod 2l5 which extends up throughthe window moulding of the door. When the push-rod H5 is pushed down, pin 2!! will contact the lower edge of slot 213 in the lever 2.

Further downward movement will cause. said lever 2 to be rotated clockwise and the up-- turned edge 214 will force the arm 243 of the locking lever 2% into locked position under the edge 225 of lever 222.

It is to be notedthat while looking the door from the outside with a key will prevent opening the door by means of the outside push-button mechanism, it will not. prevent opening by use.

of the inside'oloor handle. When the lever 2f I is rotated in a counterclockwise direction by the action of the strap 22l acting through the pin" 223', the upturned edge 2h? of said lever 2 will contact arm 244 of the locking lever 240 and will rotate it out of locked posiiton. This occurs before the shoulder 220 of said lever 2| 1 has made contact with the upturned edge 22'! of the rollback lever 222 preparatory to rotating said lever in a counterclockwise direction and thereby unlatching the door. Thus, one continuous movement of strap Hi to the left will cause first the unlocking of the lock and then its unlatching.

Also, if the locking lever 240 should be put into locked position while the door is open, it will be moved to its unlocked position when the door is closed due to the safety-catch arm 232 riding up the inclined surface H4 of the keeper and causing the dogging lever 230 to be rotated clockwise. Arm 23I of said dogging lever will contact the edge Zlla of lever 2H and cause the latter to be rotated counterclockwise. The upturned edge 2 will contact arm 244 of the locking lever 240 and rotate said lever out of locked position.

Consequently, since the only method of locking the door from the outside is by means of the key, one cannot lock himself out of the car by slamming the door when the keys are on the inside.

The rotary bolt, the pawl arm pivotally mounted on the bolt, and the pivoted ratchet lever whose movable end is supported on the safety latch, are features shown in my prior filled application Serial No. 632,302, filed December 3, 1945, and which features are claimed in said prior application.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A door locking mechanism comprising a casing having a roll-back plate extending parallel to the plane of the door and a rotor plate extending along the edge of the door, a latch bolt pivoted on said rotor plate, a dogging lever therefor pivoted on said rollback plate for rocking movement in the plane of the door and having a safety-catch arm extending therefrom through said rotor plate, for cooperation with a keeper and holding the door latched when closed, means for releasing said latch bolt and safety catch arm including a push-button slidably mounted on the outside of the door and a push-button lever engaged thereby and mounted for rocking movement on said rotor plate in a plane perpendicular to the plane of the door, and a second lever pivotally mounted on said rotor plate for movement in a plane parallel to the plane of the door and interposed between said push-button lever and dogging lever for releasably rocking said safety-catch arm upon depression of said push-button.

2. A door locking mechanism comprising a rotatable dogging lever having a safety-catch arm, a spring biasing said dogging lever arm into safety-catch position, a roll-back lever arranged for cooperation with said dogging lever, and a plurality of independently actuatable means for operating said roll-back lever to release said safety-catch arm, said means including a lever and a push-button for operating said lever from the outside of the door.

3. A door, locking mechanism comprising a rotatable. dogging lever having a safety-catch arm, a spring biasing said dogging lever arm into safety-catch position, a roll-back lever arranged for cooperation with said dogging lever, and a plurality of independently actuatable means for operating said roll-back lever to release said safety-catch arm,'said means including a lever and a push-button for operating said lever from the outside of the door and also including an inside door handle and strap connected to said roll-back lever.

4. A door lock structure comprising a rotor locking bolt, a take-up lever, a rotor locking lever cooperating with said take-up lever to lock said bolt, a dogging lever having a safety-catch arm, said dogging lever cooperating with said take-up lever and rotor locking lever to hold said bolt in locked position, and means including a pushlever having a push-button for positioning on the outside of a door and engageable with said pushbutton lever for actuating said push-lever to move said dogging lever out of its bolt holding cooperating position when the bolt is in locked position to release both said bolt and said safetycatch arm.

5. A door lock structure comprising a locking bolt, a first means including a safety-catch arm, a second means cooperating with said first means to hold said bolt in looking position, and releasing means acting through said first means for releasing both said bolt and said arm, said releasing means including a push-lever and an actuating button therefor for positioning on the outside of the door.

6. A door lock structure comprising a locking bolt, a first means including a safety-catch arm, a second means cooperating with said first means to hold said bolt in looking position with said arm in safety-catch position, outside releasing means for releasing said bolt, said releasing means including a push-lever and an actuating button therefor for positioning on the outside of the door, and means operable from the inside of the door for releasing said bolt independently of said outside releasing means.

7. A door lock structure comprising a locking bolt, members movable into cooperative engagement as said locking bolt moves into latching position, a lever having an arm movable into safety-latching position upon closing the door, said lever being simultaneously movable into position to hold said members in engagement and thus hold said locking bolt in latching position, andmeans including a push-lever operable from the outside of the door for moving said first lever out of latching position to thereby release both said locking bolt and said safety-catch arm to permit the door to be opened.

8. A door lock structure comprising a rotor type locking bolt, a member carried by said looking bolt for movement therewith, a second member for cooperation with said first member, said members being movable into cooperative engagement as said locking bolt moves into latching position, a lever having an arm movable into safety-latching position upon closing the door, said lever being simultaneously movable into position against said second member to hold said members in engagement and thus hold said locking bolt in latching position, and means including a push-lever operable from the outside of the door for moving said first lever out of holding position to thereby release both said locking bolt and said safety-catch arm to permit the door to be opened.

9. A door lock structure comprising a rotor, a rotor locking arm carried by said rotor, a movable take-up lever, a spring operative upon movement of said rotor into door latching position to move said arm intoengagement with said take-up lever inrotor locking position, a key-operated locking lever movable for locking said arm in said lock ing'posltion when said door is closed said spring being movable with said locking arm when moving from latched to unlatched position into the path of movement of said key operated locking lever, and said locking lever having an arm engageable with said spring when the door is open, blocking said locking lever from being moved into locking position when said door is open.

10. In a door lock structure including a rotor bolt rockable into latching position upon closing the door,means including, a spring carried byand movable with said rotor bolt for holding said rotor bolt in door latching position, and manually operable means movable when said door is closed tolock said door, the first means being positioned when the rotor is in unlatched position to block the movement of said locking means into door locking position.

11'. In a door lock structure including a rotor bolt'rockable into latching position upon closing the door, means including a spring carried by and movable with said rotor bolt for holding said rotor bolt in door latching position, and means including a rotatable locking lever Operable when said door is closed to lock said door, the improvement comprising providing said look-- ing. lever with a projecting portion which when the door is open will contact said spring and prevent said locking means from being operated into door locking position.

12. A door lock structure comprising a latch bolt pivoted for movement in planes parallel to the edge of the door, take-up means therefor, a dogging lever for said take-up means movable in planes" parallel to the plane of the door and having a safety latch thereon, and means for releasing said take-up means, latch bolt and safety-latch to permit opening of the door from its closed position, said releasing means including apivoted push-button actuated lever pivotally movable in planes parallel to the edge plane of the door and a cooperating lever actuated thereby and rockable in planes parallel to the plane of. the door and operatively connected with said dogging lever to actuate the same to move to a released position.

13; A door locking mechanism comprising a keeper, a bolt rockable into latching engagement by said keeper upon door closing movement, a ratchet pivotally mounted at one end, a pawl movably mounted on said bolt and bodily movable therewith engageable with said ratchet for opposing unlatching movement of the bolt, means retaining the free end of the ratchet in bold, holdingposition when theboltis in latchingposi tion, and means including a member operable from the outside of thedoor movable in a plane parallel to the door edge for releasing said re-- taming means.

14, A door locking mechanism comprising akeeper, a bolt rockable into latching position by the-keeper, a ratchet pivotally mounted at one end, a pawl movably mounted on said bolt and bodily movable therewith for engagement with the ratchet for opposing unlatching movement of the bolt, means yieldably urging the pawl toward the ratchet, means retaining the free endof the ratchet in bolt-holding position when the bolt is" in latching position, and means including a member operable from the outside of the door movable in a plane-parallel to the door edge for releasing said retaining means.

15. A door locking mechanism comprising a keeper, a bolt rockable into latching position by the keeper, a ratchet pivotally mounted at one end, a pawl movably mounted on said bolt and bodily movable therewith for engagement with the ratchet for opposing unlatching movement of the bolt, means yieldably urging the pawl toward the ratchet, means limiting the movement of the pawl toward said ratchet, means retaining the free end of the ratchet in boltholding'position when the bolt is in latching position, and means including a member operable from the outside of the door movable in a plane parallel to the door edge for releasing said retaining means.

16. A door locking mechanism comprising a keeper, a bolt rockable into latching engagement by said keeper upon door closing movement, a ratchet pivotally mounted at one end, a pawl movably mounted on said bolt and bodily movable therewith engageable with said ratchet for opposing unlatching movement of the bolt, means retaining the free end of the ratchet in bolt-holding position when the bolt is in latching position, means including a member operable from the outside of the door movable in a plane parallel to the door edge for releasing said retaining means, and inside handle-controlled means for releasing said retaining member including an element movable in a plane parallel to the plane of the door.

17. In a latching mechanism, a pivotally mounted bolt, means "for positively restraining pivotal unlatching movement of the bolt, means for releasing said restraining means, and a look-- ing member movable into the path of releasing movement of said releasing means to block said movement, said locking member and said restraining means having mutually intersecting paths or" movement whereby said locking member is movable into locking position only when said restraining means is in bolt restraining position.

18. In a latching mechanism, a pivotally mounted bolt, means for positively restraining pivotal unlatching movement of the bolt, means for releasing said restraining means, and a movable locking member for directly blocking releasing movement of said releasing means when said restraining means isin boltrestraining position, said locking member and said restrain-- ing means having mutually intersecting paths of movement whereby said locking member is blocked by the restraining means from moving into locking position when'ther'estraining means is out of 'bolt restraining position.

19. In a latching mechanism, a pivotally mounted bolt, means rendered operative by rotation of the bolt into latched position for posi' tively restraining pivotal unlatching movement of the bolt, means for releasing said restraining means, and a locking member movable into the path of releasing" movement of said releasing means when said" restraining means is in bolt restraining position, said locking member and said restraining means having mutually inter secting paths of movement whereby said locking member is movable into locking position only after said restraining means has been moved from non-bolt restraining position into bolt restraining position.

20. In a latching mechanism, a pivotally mounted main bolt for holding a door in normally latched position, aspring pressed safety of the main bolt intolatching position for post tively restraining pivotal unlatching movement of the main bolt, outside controlled operating means for releasing said restraining means, a manually movable locking member for directly blocking releasing movement of said releasing means when said restraining means is in bolt restraining position, said locking member and said restraining means having mutually intersecting paths of movement whereby said locking member is movable into locking position only when said restraining means is in bolt restraining position, said inside control means for shifting said locking member to and from looking position.

21. A door lock mechanism comprising a rotary bolt, a safety catch arm and means cooperating with said arm for holding said bolt in latched position, a safety catch release member, a key controlled lock member movable for blocking release movement of said release member, an inside hand-operated mechanism effective for actuating said release member and actuating said key controlled lock member to and from blocking position, and an inside lever-operated mechanism operative in one position to block unlocking movement of said lock member either by key operation or by the inside handle mechanism.

22. A door lock mechanism comprising a rotary bolt, a safety catch arm and means cooperating with said arm for holding said bolt in latched position, a safety catch release member, a key controlled lock member movable for blocking release movement of said release member, an inside band-operated mechanism effective for actuating said release member and actuating said key controlled lock member to and from blocking position, and an inside lever-operated mechanism operative in one position to block release movement of said release member.

23. A door lock mechanism comprising a rotary bolt, a safety catch arm and means cooperating with said arm for holding said bolt in latched position, a safety catch release member, a key controlled lock member movable for blocking release movement of said release member, an inside hand-operated mechanism effective for actuating said release member and actuating said key controlled lock member to and from blocking position, and an inside lever-operated mechanism movable into interlocking engagement with a portion of a door molding for blocking unlocking movement of said lock member either by key operation or by the inside handle mechanism.

24. A door lock mechanism comprising a rotary bolt, a safety catch arm and means cooperating with said arm for holding said bolt in latched position, a safety catch release member, a key controlled lock member movable for blocking release movement of said release member, an inside hand-operated mechanism effective for actuating said release member and actuating said key controlled lock member-to and from blocking position, and an inside lever-operated mechanism movable into interlocking engagement with a portion of a door molding for blocking release movement of said release member.

25. In a door locking structure for mounting on an automobile door and having parts for cooperation with the inside molding of the door, the structure including a rotor bolt having a setting arm and a locking arm, a rotor locking lever piv otally connected to said locking arm, a movable take-up lever for cooperation with said rotor looking lever to hold said bolt in latched position, spring means for urging said rotor locking lever into holding engagement with said take-up lever, a dogging lever having an arm for movement into safety-latching position and having a portion operative for holding said take-up lever immovable, a locking lever key-operated from the outside and having a projecting portion arranged to strike said spring means when said bolt is in unlatched position and said locking lever is moved toward locking position to prevent movement of said locking lever into full locking position, a releasing lever for cooperation with said dogging lever to move its said arm out of safety-latching position, a lever movable parallel to the door edge operable from the outside for actuating said releasing lever, an immobilizing lever having a portion for engagement with said key-operated looking lever to actuate the same and a portion cooperating with said dogging lever to immobilize the same, means operable by the inside door handle to actuate said immobilizing lever and means for moving said immobilizing lever into engagement with said locking lever and into immobilizing position with respect to said dogging lever, said means being adapted to thereupon be engaged with the inside door molding to hold all parts of said locking structure immobilized and incapable of being moved by said key-operated locking lever or by said inside door handle operated means.

26. A door latch mechanism comprising a rotary bolt mounted for pivotal movement parallel to a door edge for engagement with a keeper to hold the door in latched and locked position, a ratchet lever pivotally mounted at one end thereof, a pawl arm pivotally mounted on said bolt engageable with said ratchet lever for holding the bolt in latched position, spring means for urging said pawl arm into operative engagement with said ratchet lever, a pivoted safety latch member mounted for pivotal movement perpendicular to the door edge having a safety catch nose for engagement with a safety catch projection on a keeper, an operating arm on said safety latch member, a, dogging shoulder on said safety latch member for holding the unpivoted end of said ratchet lever immovable during the latched position of said bolt, a safety latch release member pivotally mounted for movement perpendicular to the door edge engageable with said operating arm, and an outside latch operator pivotally mounted for rocking movement parallel to the door edge operable through said latch release member for unlatching and undogging movement of said safety latch member.

2'7. A door latch mechanism comprising a rotary bolt mounted for pivotal movement parallel to a door edge for engagement with a keeper to hold the door in latched and locked position, a ratchet lever pivotally mounted at one end thereof, a pawl arm pivotally mounted on said bolt engageable with said ratchet lever for holding the bolt in latched position, spring means for urging said pawl arm into operative engagement with said ratchet lever, a pivoted safety latch member mounted for pivotal movement perpendicular to the door'edge having a safety catch nose for engagement with a safety catch projection on a keeper, an operating arm on said safety latch member, a dogging shoulder on said safety latch member, for holding the unpivoted end of said ratchet lever immovable during the latched position of said bolt, a safety latch release member pivotally mounted for movement perpendicular to the door edge engageable with said operating arm, an outside latch operator pivotally mounted for rocking movement parallel to the door edge operable through said latch release member UNITED STATES PATENTS for unlatching and undogging movement of said safety latch member, and inside handle-operated Number Name Date means acting on said latch release member for 1,738,338 9 Wells Dec. 3, 1929 operating the latter. 5 2,094,413 Schonitzer Sept. 28, 1937 EDWARD D. DALL. 2,234,810 Simpson Mar. 11, 1941 2,246,784 Dall June 24, 1941 REFERENCES CITED 2,246,785 Dall June 24, 1941 The following references are of record in the 2,270,559 Rolph et a1. Jan. 20, 1942 file of this patent: 10 2,301,559 Marple 1- Nov. 10, 1942 

